did u.s. gymnastics officials ignore sexual abuse complaints in good night. >> dubois: the war against zika. >> the situation is getting critical. >> dubois: they're spraying for mosquitos, but how safe are those chemicals for humans? also tonight, that cash to iran. the president says the $400 million payment wasn't a secret, and it wasn't ransom. >> we do hostages. >> dubois: accusations that u.s. gymnastics officials ignored sexual abuse by coaches. >> he took her innocence. he took her trust. >> dubois: and the decades-long search for a missing veteran takes a surprising turn. >> i was like what? are you for real? and i was just, like, speechless. evidence just in shock.

with scott pelley. >> dubois: good evening. scott is off tonight. i'm maurice dubois. president obama warned congress today money is rapidly running out for the battle against zika, even as more americans become infected. the situation, he said, is critical. >> a lot of folks talk about protecting americans from threats. well, zika is a serious threat to americans, especially babiess, right now. so once again, i want to urge the american people to c tell them to do their job. deal with this threat, help protect the american people from zika. >> dubois: the air war against mosquitos carrying the virus began today in south florida. planes are spraying insecticide in the miami neighborhood where officials say at least 15 people were infected by local mosquitos. david begnaud is is there. >> reporter: today's aerial assault in a 10-mile radius

that's according to tom frieden, director of the c.d.c. >> the aerial spraying is quicker than the truck-based spraying and reaches many places that truck-based and hand-based spraying can't reach. >> reporter: florida's governor rick scott announced a 10-block area in the northwest corner of the zika zone has been cleared. >> we're very comfortable that we are not seeing any active cases there. >> reporter: in reviewing the results of today's aerial spraying, the c.d.c. director says a check of mosquito traps killed using the insecticide naled. one fluid ounce was sprayed per acre. e.p.a. guidance on naled said it poses no health risk tow people, but environmental groups showed in animals it caused skin damage. those fears were shown on social

>> reporter: aileen marty is an infectious disease doctor. is naled bad in the context and the dose being used behind that plane? >> the dose is so low and so fine a mist, that it's almost impossible-- not totally impossible-- but almost impossible for any human to have any significant effect in the way that they're spraying and at the heights that it's being sprayed. >> reporter: no decision has been made on when to resume that maurice, the most important thing people in south florida can do tonight is clear standing water around your home, even the tiniest amount, because this is the type of mosquito that can can breed in even a bottle cap. >> dubois: it certainly is inspectedded david begnaud in miami tonight. and we have posted a lot more information about zika on our web site. you can find it at cbsnews.com/zika. severe storms broke out today in the south. a possible tornado tore through

at least two people were injured. earlier, a tornado touched intown in northern florida. it flipped trucks and damaged homes in the town of yulee, near jacksonville. it is not known if anyone was hurt there. now, to the race for the white house. donald trump's campaign is struggling. republican supporters are trying to help him, but sometimes he just can't seem to help himself. here's major garrett. >> this is a very, vy out and beautiful crowd. >> reporter: today in maine and throughout the most turbulent week of his campaign, donald trump drew big crowds of the converted after bouncing from controversy to controversy, trump seemed to heed the advice of many republicans and focused most of his rhetoric on hillary clinton. >> the queen of corruption. we're both supposed to be briefed in the not-too-distant future. and i'm saying you can't brief her. >> reporter: but trump also veered into territory where the facts don't follow urepeating

a secret video of the currency exchange in iran at the time the u.s. hostages were released in january. >> the tape was made, right. you saw that, with the airplane coming in. nice plane. and the airplane coming in, and the money coming off, i guess, right? that was given to us-- has to be-- by the iranians. >> reporter: there's no evidence of such a video, and the one his campaign says he was talking about shows the hostages in switzerland, not the transfer of funds in iran. speaker paul ryan in next week's primary also continues to be a distraction. today, ryan responded. >> reporter: trump's running mate, mike pence, endorsed ryan yesterday. trump said it's not an issue. >> he said, "but i like him. he's a friend of of mine. would you mind if i endorse him

"yes." "go ahead and do it 100%." >> reporter: pence was asked if his role was to soften up trump's rough edges. >> sometimes things downtown of don't always come out like you mean, right, and donald trump and i are absolutely determined to work together. we have different styles. you might have noticed that. >> reporter: earlier today, pence ignored an opportunity to endorse g.o.p. senators john mccain of arizona and kelly ayotte of new hampshire, prompt, cheers from top democrats. maurice, pence is trying endorsing both, another example of things not coming out as you mean. >> dubois: major garrett in washington. trump was one of the topics at a news conference president obama held today at the pentagon after getting a briefing there about the battle against isis. here's margaret brennan. >> reporter: president obama dismissed a claim by crump that the november elections may be rigged. >> of course, the elections will not be rigged.

the federal government doesn't run the election process. states and cities and communitieses all across the country, they're the ones who set up the voting systems and the voting boots. and if mr. trump is suggesting there is a conspiracy theory, that's ridiculous. that doesn't make any sense, and i don't think anybody would take that seriously. >> reporter: the president defended his decision to pay iran $400 million in january, around the same time the american prisoners were released from iran. >> we announced these payments in january, many months ago. there wasn't a secret. we announced them to all of you. the reason that we had to give them cash is precisely because we are so strict in maintaining sanctions, and we do not have a banking relationship with iran,

acknowledged a long-shot plan to work with the russianss in syria, a brutal war that he said tortures him. >> i've been wrestling with this thing now for a lot of years. i'm pretty confident that a big chunk of my gray hair comes out of my syria meetings. and there's not a meeting that i don't end by saying, "is there something else we could be doing that we haven't thought of?" >> reporter: ending that war the president said the u.s. is winning on the battlefield, but he admitted that's not enough to end the terror threat. maurice, he said there may already be isis networks here in the u.s. >> dubois: margaret brennan at the pentagon. new polls show hillary clinton pulling ahead in national pollses and three of the battleground states. >> secretary clinton's opponent

>> reporter: clinton was greeted in las vegas today by nevada's powerful retiring senator, harry reid, and the woman running to replace him. >> i'm ready to put hillary in the white house. what do you think? >> reporter: a show of support from well-known leaders that trump hasn't matched. nevada's republican governor and republican senator have both steered clear of him. >> i just can't agree with some of his positions. >> reporter: it can make a difference in a battleground state. polls show clinton suddenly leads in pennsylvania by 11, michigan by nine, and in new hampshire by 15. her surge partly powered by college-educated white voters who have leaned republican since at least 1980 but now favor clinton by five points. >> i am sick and tired of leaders in this country trying to bust unions like donald trump did right here in las vegas. >> reporter: she's also been hammering away at trump's business record for a solid week

barware-- made all over the world. >> reporter: drawing the focus away from some of her weaknesses. >> donald trump says the reason he makes so many of his products overseas is because of the markets, because it's just too expensive to do it here right now and that he would change that market as president. >> you know be when you run for president you need to be judged by what you have done and i think the evidence is pretty clear-- everything he's made he's made somewhere else. he's not put americans to work. >> reporter: the supersupporting clinton has pulled down their ads in two other battleground states, colorado and virginia. it's a sign, maurice, they're feeling pretty good about her chances there, at least for now. >> dubois: there is that one nagging issue for clinton, her use of important computer servers for e-mail while she was secretary of state, and what she told the american people, congress, and the f.b.i. about it. today, of norah o'donnell talked

running mate, virginia senator tim kaine. >> reporter: on the e-mails, though, the f.b.i. directors called her actions careless. >> yeah, he said that, and i think she would acknowledge that. she said, "look, it was a mistake, and i've learned from it, and i'd do something different." and, look, i think this probably taught a lot of people because others have done similar thengz or been careless in similar ways-- >> reporter: but when charlie rose asked her that question, hillary clinton that question, she said, "no, no, no, that's said." why continue to twist the knife on those things? doesn't that field those perceptionses she's not answering truthfully. the "washington post" fact checker said hillary clinton relies on technical and legalistic answers to explain her actions. >> hillary and i have talked about this personally, and then we sat down within minutes after i was rolled out as her running mate to do a "60 minutes" interview and she said, "i made a mistake. i screwed up and i learned

differently." that's the way she's pitched it to me and i think that's the honest response, and i've heard her say that a number of times. >> dubois: and you can see more of norah's interview with senator kaine tomorrow on "cbs this morning"." a tourist hub in london became a hunting ground last night when a teenager went on a stabbing spree. an american woman was killed, five other people were wounded. the attack was in russell square, not far from where bombs went off during a terror attack in july of 2005. >> reporter: the stabbing in central london killed darlene horton, who was here with her husband, a professor at the university of florida state. the random attack wounded five other people, too, including american martin hoenisch. minutes later, the police had tasered the suspect, who's now been arrested on suspicion of murder. there have been six terrorist attacks in europe since june

attacker in this case, too, had extremist links. but they've now ruled that out. he was, they say, mentally ill. still, this is a city on edge. yesterday, the police announced that hundreds more armed officers will soon be on duty, ready to respond to threats. though, more than niewnt% of the police here will continue not to carry firearms. london's mayor sadiq khan says threats can come from anywhere, showed, guns are only part of the answer. >> the person responsible wasn't shot dead. he was tasered, which means there will be justice. he will be charged. he will be prosecuted. >> reporter: last night's stabbings weren't carried out by a terrorist, but the police have been very frank, telling the british people it's not a question of if there will be an attack here but when. elizabeth palmer, cbs news, london. >> dubois: coming up next on

gymnastics officials ignore allegations that coaches were sexually abusing athletes? and later, the search for an m.i.a., a veteran, missing in america. hey, need fast heartburn relief? try cool mint zantac. it releases a cooling sensation in your mouth and throat. zantac works in as little as 30 minutes.

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don't let dust and allergens get between you and life's beautiful moments. flonase gives you more complete allergy relief. most allergy pills only control one inflammatory substance. flonase controls 6. and six is greater than one. flonase changes everything. ? >> dubois: one day before the rio olympics, there's a network and the "the indianapolis star." the governing body for american gymnastics is accused of routinely protecting coaches who are accused of sexually aabusing young athletes. anna werner has more on this. >> reporter: the newspaper found u.s.a. gymnastics failed to report years of allegations of abuses by coaches to authorities, potentially leaving young gymnasts at risk.

12-year-old daughter started receiving sexually suggestive e-mails from her gymnastics coach william mccabe in 2005. >> i felt like someone was definitely closer to my daughter than i wanted them to be. >> reporter: she said she later discovered u.s.a. gymnastics had been aware of other allegations against mccabe going back to 1998, including one from a florida gym where mccabe once work. in court depositionses obtained by the "the indianapolis star," u.s.a. gymnastics officials admitted to not reporting allegations to police and dismissing them as hearsay unless they came directly from a victim or a parent. attorneys in the lawsuit say u.s.a. gymnastics had abuse complaint files on 53 coaches. mccabe was later convicted of sexually exploiting children, and is now serving 30 years. kaylin britskee told "usa today"

started abusing her at a gym in rhode island when she was seven. >> my mom asked me, "did jim ever touch you in-- in your private parts?" you know, i remember it like it was yesterday. >> reporter: bell pleaded guilty to molestation charges last year. ( crying ) today, u.s.a. gymnastics issued a statement saying it has encouraged anyone who believes abuse has occurred to contact law enforcement and frequently works with law enforcement on for parents like lisa ganser, that is little comfort. >> well, he took her innocence. he took her trust. >> reporter: u.s.a. gymnastics is asking a judge to dismiss that case. as to the other 53 complaint files on coaches, those are being held under seal. two newspapers have filed motions to get the content of those files made public. >> dubois: anna werner, thanks so much. when we come back in a moment,

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>> dubois: the white man who gunned down nine african americans during a bible study in charleston, south carolina, last year, was beaten up in jail today. officials say dylann roof was walking out of his cell towards the showers when another inmate started punching him. roof suffered bruises to his face and back. he goes on trial for murder in january. soda is fizzling, and bottled water is to sales. a marketing study out today finds companies expect to ship 12.6 million gallons of water this year, compared to 12.4 million of carbonated beverages. it's the first time water has topped soda and it reflects consumers' interestses in healthier drinks. and the water was just right for these three bears. a momma and her two cubs cooling off the other day in lake tahoe, california.

the guys paddling offshore looked like they couldn't care less. the bears sniffed around, but with no picnic baskets to be found, they headed back to the woods, where they belong. coming up next, the search for a missing veteran. all his family had to go on was hope. a meeting? it's a big one. too bad. we are double booked: diarrhea and abdominal pain. why don't you start without me? oh. yeah. unpredictable diarrhea and abdominal pain, you may have irritable bowel syndrome with diarrhea, or ibs-d. a condition that can be really frustrating. talk to your doctor about viberzi, a different way to treat ibs-d. viberzi is a prescription medication you take every day that helps proactively manage both diarrhea and abdominal pain at the same time. so you stay ahead of your symptoms. viberzi can cause new or worsening abdominal pain. do not take viberzi if you have or may have had: pancreas or severe liver problems,

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>> dubois: it is a national tragedy. the government estimates more than 47,000 veterans are homeless. more than 13,000 live on the streets. german leon was one of them. for decades, and then came fate and facebook. mark strassmann has his story. >> reporter: in 1984, german leon, a 21-year-old army vet, disappeared. marta sallie, his younger sister.

>> reporter: when did you get worried? >> i got worried after i saw a year, then to years, and then-- when it got to five years i was like, something is wrong. >> reporter: leon bounced around atlanta's shadows in a series of part-time jobs, rooming houses and homeless shelters. the army vet kept radio silence with his family. >> he was like a gentle giant. >> reporter: patrice green, a social worker with the veterans homeless shelter last april. like so many veterans, leon had untreated mental health issues. >> and so i asked, "well, where are your family?" and he said, "i don't know." >> reporter: green searched online, including a facebook message tow four possible family members. >> and the very next day, i get a call from the sister, and she's like, "is this a joke?" >> you know, i was thinking probably another hoax.

and i knew it was real. >> reporter: this army family's reunion of 32 years in the making. >> i hugged him, and i told him that, you know, we never-- i never gave up on him. >> i was shocked. and i was crying inside. >> reporter: she says it's a miracle. >> it's a miracle to her, but it's-- it's-- it's a miracle to me, >> reporter: leon's sister says all the questions he can't answer don't matter. he's home. mark strassmann, cbs news, charleston, south carolina. >> dubois: and that is the cbs evening news. for scott pelley, i'm maurice dubois in new york. thanks so much for joining us. have a good night.

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